Crane operation
11.5 Crane operation with main boom
11 - 120 3 302 819 en Operating manual
GMK3060
13.12.2018
Hoists High-speed mode is always switched on and off simultaneously for the main hoist
and the auxiliary hoist.
To switch on briefly
• Press the button at the right on – for (1).
High-speed mode will be active until you release the button.
Continuous operation
• Press the button at the left on – for (2).
High-speed mode will be enabled until you press the button again.
The symbol (1) indicates the current status:
The symbols show the direction of rotation of the hoist:
H
The speed of the hoists will only be significantly increased by switching to high-
speed mode if you have deflected the control lever by more than 70%.
S
Risk of accidents due to overloading!
Make sure the lifted load is no more than 50% of the maximum load according to
the Lifting capacity table (maximum degree of utilisation of 50%) before operating
the hoists in high-speed mode.
S
Danger of slack rope with a lightweight hook block!
If you switch on high-speed mode at high speeds, a light hook block will not be
able to keep the hoist rope taut if it is hoisted up high with a small number of reev-
ings and a large boom length.
S
Danger of slack rope with large number of reevings
If you switch on high-speed mode with a large number of reevings and without a
load, slack rope may form because the hook block is lowered too slowly due to
the high degree of friction.
– Lights up: High-speed mode switched on
– Gone out: High-speed mode switched off
1 Lifting the hoist
2 Lowering the hoist
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